Multisite: add a basic installer

* insert database structure
* add a main site based on the current server http host (with fallback)
* add languages for eacht site

Note: locale won't be inserted from this installer, since the Locale module
isn't installed yet
Revert "Multisite: add a basic installer"

This commit was done in the wrong branch

This reverts commit d1a16739da3a18ceb0fd84099252922649cdbe9c.
Fix installing the blog module

When installing example data and not ticking the blog checkbox,
The blog module was added to the array as lowercased string.
Fixes visibility of field for base of Analytics index
Fixes action names for Analytics calls
Updates changelog
Merge pull request #756 from jonasdekeukelaere/fixes-analytics

Fixes analytics module
Merge branch 'master' into multisite